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6. Candidate A got 60,008 votes, candidate B got 50,352 votes and candidate C
got 78,980 votes in an election. Can you tell who is the winner of the election
and by how many votes the candidate won the election from his immediate
competitor? COMPeteNCy-bASed QueStiON
7. A ship has to travel a distance of 12,600 km between two major cities. The
journey was divided into four parts. The ship travelled 2,450 km in the first part,
3,500 km in the second part and 2,700 km in the third part. How much distance
did the ship need to cover in the fourth part to complete the journey?
8. Radhika’s monthly income is `59,089 and Mohan’s monthly income is `75,830.
What is the difference between their monthly incomes?
9. An NGO working on the education of poor children needs to raise funds of
`50,000 for stationery. So far they collected `18,750. How much money are
they short of?
Mental Maths Critical Thinking
1. Fill in the blanks.
(a) 5000 + 8 + 18 = __________. (b) 6567 + 9845 + 372 = __________.
(c) 8 ten thousands + 5 thousands + 15 hundreds + 12 tens = __________.
(d) The difference of 8095 and 3002 is __________.
2. tick the two numbers that add up to the number in the centre of each rectangle.
(a) 5555 (b) 98989
10000 55555 45555 800000 898989 88888
35555 900000
maths fun Logical Thinking
l Take any 4-digit number where not all digits are the same.
l Arrange the digits in descending order to create the greatest
possible number.
l Arrange the same digits in ascending order to create the smallest possible
number.
l Subtract the smaller number from the greater number. Repeat the process
(step 2 to 4) with the result you get from step 4 to get number 6174 as result.
For example, let us take 1542.
Rearrange the digits and subtract: 5421 – 1245 = 4176
Repeat it again: 7641 – 1467 = 6174
Use the Internet and find out what the resultant number 6174 is called.
Mathematics-4 51

